| 摘要 |
An artificial cardiac pump, comprising an impeller ( 3 ) rotatably supported on a fixed shaft body ( 2 ) in a housing ( 1 ) and a drive mechanism rotating the impeller, wherein blood is taken in from the front side and force-fed to the rear side by the rotation of the impeller ( 3 ). The shaft body ( 2 ) is connected between a front side fixed body ( 5 ) fixed to a straightening plate ( 4 ) joined to the housing ( 1 ) at the front of the impeller ( 3 ) and a rear side fixed body ( 7 ) fixed to a diffuser ( 6 ) joined to the housing ( 1 ) at the rear of the impeller ( 3 ). The impeller ( 3 ) further comprises a sleeve ( 8 ) having an inner peripheral surface opposed to the outer peripheral surface of the shaft body ( 2 ) through a minute clearance and front and rear end faces opposed to the rear end face of the front side fixed body ( 5 ) and the front end face of the rear side fixed body ( 7 ) through minute clearances, and an impeller ( 9 ) joined to the outer peripheral surface of the sleeve ( 8 ). The drive mechanism further comprises a polar anisotropical permanent magnet ( 10 ) enclosed in the sleeve ( 8 ) and a rotating field generator ( 11 ) enclosed in the housing ( 1 ). |
